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4x+7=-8.2x+55
We move all terms to the left:
4x+7-(-8.2x+55)=0
We get rid of parentheses
4x+8.2x-55+7=0
We add all the numbers together, and all the variables
12.2x-48=0
We move all terms containing x to the left, all other terms to the right
12.2x=48
x=48/12.2
x=3+8.1428571428571/8.7142857142857
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